Welcome to our dedicated page for INSMED SEC filings (Ticker: INSM), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Insmed Incorporated filings document formal disclosures for its commercial biopharmaceutical portfolio and respiratory and inflammatory pipeline. Recent Form 8-K reports furnish financial results, investor presentations, Regulation FD materials, clinical-study updates for ARIKAYCE and brensocatib, regulatory approval announcements for BRINSUPRI, and portfolio additions such as INS1148.
The company’s proxy materials describe board elections, executive compensation, equity awards, shareholder voting matters and governance practices. Other current reports document compensatory arrangements, director-transition disclosures, exhibits and Inline XBRL cover-page data tied to Insmed’s Nasdaq-listed common stock.
Martina Flammer, M.D., Chief Medical Officer of Insmed Inc. (INSM), reported multiple option exercises and subsequent open-market sales on 09/02/2025 under a 10b5-1 trading plan. The filing shows the exercise of stock options at strike prices ranging from $17.07 to $34.03, converting options into shares (total option exercises listed include 186,943 underlying shares across multiple option grants). Following exercises, the report lists a series of sales on the same date totaling 209,066 shares sold at weighted-average prices between $140.56 and $146.51, with incremental remaining beneficial ownership reported at 83,111 shares after the transactions. The Form 4 notes the 10b5-1 plan was adopted on February 27, 2025, and includes vesting schedules for each option series.
JPMorgan Chase & Co. filed an amendment to Schedule 13G reporting beneficial ownership of 23,014,584 shares of Insmed Incorporated common stock (CUSIP 457669307), representing 10.8% of the class. The filing breaks down voting and dispositive powers: 20,997,990 shares with sole voting power and 22,971,006 shares with sole dispositive power; smaller amounts are held with shared powers. The filing lists affiliated entities through which holdings are held, including J.P. Morgan Trust Company of Delaware, J.P. Morgan Securities LLC, JPMorgan Chase Bank NA, and various asset management and international affiliates. The filing certifies the shares are held in the ordinary course of business and not for the purpose of influencing control.
Form 144 filed for Insmed, Inc. (INSM) reporting a proposed sale of common stock. The notice lists a proposed sale of 186,648 shares through Merrill Lynch (Washington, DC) with an aggregate market value of $26,935,498 and total shares outstanding of 211,374,786. The shares to be sold were acquired on 09/02/2025 under a stock plan and the payment/settlement date is the same day. The filing also discloses that the reporting person, Martina Flammer, sold 55,564 shares during the past three months for aggregate gross proceeds of $5,190,291 across four transactions dated 06/03/2025 to 08/04/2025. The form includes the standard representation that the seller is not aware of undisclosed material adverse information.
Insmed, Inc. reported a Form 144 notice for the proposed sale of 24,272 common shares through Merrill Lynch on Nasdaq, with an aggregate market value of $3,491,647.00 and an approximate sale date of 09/02/2025. The filing lists multiple stock-plan acquisitions by the seller throughout 2024–2025 totaling 31,272 shares acquired (individual grants dated 07/08/2024, 01/04/2025, 01/06/2025, 01/07/2025, 02/05/2025 and 09/02/2025). It also discloses sales by the same person during the past three months: 933, 748, 1,879 and 1,448 shares generating stated gross proceeds of $95,617; $72,114; $138,050; and $103,532 respectively. The filer certifies no undisclosed material adverse information and follows the Rule 144 notice requirements.
Insmed, Inc. (INSM) Form 4 shows Director Melvin Sharoky reported a sale of 10,000 shares of Insmed common stock on 08/20/2025 at a reported price of $129.50 per share. After the sale, the reporting person beneficially owns 274,516 shares, held directly and indirectly through various entities and UTMA custodial accounts.
The filing lists multiple indirect holdings: 100 shares held for Owen F. Paley UTMA/FL, 900 by Baby Gator LLC, 10,000 by Padonia, LLC, and additional amounts held for family members and custodial accounts. The report was signed by Melvin Sharoky via attorney-in-fact on 08/21/2025.
Insmed Inc. insider sale disclosure: The company's Chief Operating Officer, Roger Adsett, reported selling a total of 25,000 shares of Insmed common stock on 08/19/2025 in two transactions. The filings show 20,193 shares sold at a weighted-average price of $127.42 (range $127.00–$127.99) and 4,807 shares sold at a weighted-average price of $128.27 (range $128.00–$128.72). After these sales, the report lists beneficial ownership of 110,444 shares in one line and 105,637 shares in another line, each reported as direct ownership. The Form 4 was signed via power of attorney.
Insmed Inc. insider transactions by Chair and CEO William Lewis show option exercises and multiple stock sales executed under a 10b5-1 plan on 08/18/2025. The filing reports the exercise of 6,865 stock options at an exercise price of $10.85 and the acquisition of 6,865 common shares via that exercise. On the same date the reporting person sold a total of 6,865 common shares in separate sell transactions: 2,968 shares at a weighted average price of $127.59, 2,481 shares at $128.76, and 1,416 shares at $129.47. After these transactions the reporting person beneficially owns 303,911 shares indirectly and 50,500 shares indirectly via two trusts.
Insmed, Inc. (INSM) Form 144 filing reports a proposed sale of common stock by an insider. The notice shows 10,000 shares to be sold through Merrill Lynch (Orlando address) with an aggregate market value of $1,294,600.00 and company common shares outstanding listed as 211,374,786. The securities were acquired via stock options on 05/13/2021 (5,865 shares) and 05/22/2024 (13,192 shares). A sale of 10,000 shares by Melvin Sharoky on 08/12/2025 is also reported with gross proceeds of $1,215,350.00. The filer certifies no undisclosed material adverse information. Specific filing date is not provided in the content.
Insmed, Inc. (INSM) Form 144 notifies market participants that an insider intends to sell 25,000 shares of common stock through Merrill Lynch on 08/19/2025, with an aggregate market value of $3,188,795.00. The filing shows total outstanding shares of 211,374,786, indicating the proposed sale is a small fraction of the float. The shares to be sold were principally acquired through the company's stock plan between 2020 and 2025, with specific grant lots listed. The filer also reported two recent open-market sales in June 2025 totaling 12,546 shares for gross proceeds of $1,188,677.00. The notice contains the standard attestation that the seller is not aware of undisclosed material adverse information.
Insmed, Inc. (INSM) filed a Form 144 proposing the sale of 6,865 common shares under Rule 144, with an approximate aggregate market value of $881,244, to be sold through Merrill Lynch on NASDAQ on 08/18/2025. The filing states those shares were acquired on 08/18/2025 through stock plan activity and lists prior sales by the same account (William Lewis and William Lewis TTEE) totaling multiple transactions from 05/20/2025 through 08/04/2025, including a large sale of 129,805 shares on 06/16/2025 generating $13,027,678. The notice includes the standard Rule 144 attestation that the seller is not aware of undisclosed material adverse information.